Finding the Fourth Proportional to 100.82, 151.33 and 68.22

Step by Step Solution

1. Step 1: Write the proportion equation
   100.82 : 151.33 = 68.22 : x
2. Step 2: Convert to fraction form
   100.82/151.33 = 68.22/x
3. Step 3: Cross multiply
   100.82x = 151.33 × 68.22
4. Step 4: Simplify right side
   100.82x = 10,322.81
5. Step 5: Solve for x
   x = 10,322.81/100.82
6. Step 6: Final answer
   x = 102.39